Matching of the hottest pearlescent pigment with h

2022-08-13
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The matching of pearlescent pigments with high transparency inks or inking oils

because the unique gloss and color of pearlescent pigments are completely dependent on the reflection and transmission of light, any factors that weaken and hinder the reflection and transmission of light, such as scattering pigments (fillers), crystals, and the dispersion in heterogeneous polymer systems, will make it difficult for the pearlescent effect of the final product to be fully displayed. Generally speaking, the more transparent the ink or inking oil is, the more pearlescent the final product is. If you use an inking oil with poor transparency, the pearlescent effect is poor

the concentration of pearlescent pigments also has strict requirements for carrier inks. Generally speaking, the concentration of pearlescent pigment we recommend is 10% ~ 20:6 (total weight ratio of ink). In most cases, the concentration of 12% to 15% can achieve the ideal pearlescent effect. To achieve good pearlescent effect, the carrier ink of pearlescent pigment is also required to have as high transparency as possible. The color of the ink itself will also directly affect the pearlescent effect. If the ink color is yellow or the definition is not enough, the pearlescent effect after printing is not ideal, and the surface turns yellow. The key is to make the pearlescent paste and ink cabinet soluble

color matching of pearlescent pigments and other pigments

pearlescent pigments can be mixed with transparent pigments to make the color of products more natural, vivid and attractive. For example, the color reproduction is ideal when it is mixed with phthalocyanine blue and phthalocyanine green with high transparency and low hiding power, and organic pigments such as sun fast bright red, quinacridone and YONGGU violet with high transparency. Stable organic dyes can also be mixed with pearlescent pigments, and the effect is also satisfactory. When mixed with opaque pigments (fillers) such as ordinary metal pigments, titanium dioxide series pigments, iron red, iron yellow, etc., due to the covering and scattering of light by the covering pigments, the unique hue and gloss of pearlescent pigments will be lost. When it is necessary to add covering pigments (fillers), the addition amount should be as small as possible, usually not more than 0.1% of the pigment

some pearlescent pigments can also be mixed with carbon black and ultramarine. Although they are opaque and have strong covering power, they absorb all the transmitted light of pearlescent pigments, but make the reflected light stronger by adding a foil rolling production line. Not only does the final print have good pearlescent effect, but also produces additional color effect. For example, when silver white pearlescent pigments are mixed with carbon black, a metallic silver gray will appear, and the hiding power will be improved at the same time. Blackness value can be adjusted by changing the amount of carbon black, so as to achieve satisfactory results. When the golden pearlescent pigment is mixed with carbon black, it can create a deep metallic tone. For example, when golden pearlescent pigments are mixed with carbon black, they will show a deep bronze color

dispersion of pearlescent pigments

the unique hue and pearl and metal luster of pearlescent pigments on the final print mostly depend on whether the pearlescent pigments can be evenly dispersed and well arranged in parallel (see Figure 1)

when preparing pearlescent ink, pearlescent pigment should be added in the final stage of mixing, that is, when all other components have been mixed evenly, it can be added. This can prevent pearlescent pigments from being damaged due to excessive shearing. In the production process, pre dispersion method is often used to prepare pearlescent ink. The method is: first wet the pearlescent pigment with a small amount of solvent, then add a small amount of carrier ink and stir evenly, and finally add the concentrate to the remaining ink for further stirring and dispersion. Mixing should be carried out by mixing with low shear force and high speed to find out where there is a damage device. It takes about 15 minutes to ensure uniform dispersion. In order to prevent the pigment flakes from being damaged, high shear mixing devices, such as ball mills and stone mills, should be avoided. These problems are ignored by many operators, such as ball mills and three roller mills

pearlescent inks or pearlescent coatings with low viscosity and avoiding re hygroscopic viscosity are prone to delamination or precipitation. When using, it should be stirred in time to prevent precipitation from affecting the product quality

the reproduction of pearlescent effect largely depends on the thickness of the ink film. Only when the ink film is thick can large particles of pearlescent pigments exist in the ink film, and then the pearlescent effect is obvious. Therefore, when printing, we should try our best to ensure that the ink output is appropriately large. In printing, we should try to use higher printing pressure and lower nano printing speed. These conditions can make the ink output larger and the ink film of the print thicker, so that the print has a good pearlescent effect

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